Journal List > J Korean Acad Conserv Dent > v.36(1) > 1056481

Park, Lee, Nah, Chang, Hwang, Oh, and Hwang: The evaluation of color and color difference according to the layering placement of Incisal shade composites on the body composites of the indirect resin restoration

Abstract

Objectives:

The aim of this study was to evaluate the surface color of indirect resin restoration according to the layering placement of different shade of incisal composite.

Materials and Methods:

In this study, CIE L*a*b* value of 16 Body composite of Tescera ATL (Bisco, Schaumburg IL, USA) was measured by spectrophotometer (NF999, Nippon Denshuku, Japan), and compared to CIE L*a*b* value of Vitapan shade guide. Nine shade Incisal composite of Tescera ATL were buildup to 1 mm thickness on Body composites inlay block, and CIE L*a*b* value was measured. Incisal composite was ground to 0.5 mm thickness and CIE L*a*b* value was re-measured. Color difference between Body composite and Incisal composites layered on Body composite was calculated as a function of thickness.

Results:

Color difference between corresponding shade of Tescera Body composite and Vitapan shade guide was from 6.88 to 12.80.
L* and b*value was decreased as layering thickness of Incisal composite on Body composite was increased. But, a* value did not show specific change tendency.

Conclusions:

Surface color difference between Body composites and Incisal composites layered on Body composite was increased as the layering thickness of Incisal composite increased (p < 0.05).

References

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Table 1.
Shade of used body and incisal composites
Body shade Lot. No Incisal shade (Code) Lot. No.
A1 0500002113, 2007-09 Light yellow (ILY) 0500010731 2008-06
A2 0600000295, 2008-10 Super transparent (ST) 0400010117 2007-01
A3 0600001396, 2008-12 Clear (IC) 0500009034 2008-06
A3.5 0500005937, 2008-05 Neutral (IN) 0500002114 2007-11
A4 0500007206, 2008-06 Yellow (IY) 0500002637 2007-09
B1 0500002980, 2007-12 Blue (IB) 0400004112 2006-08
B2 0600000916, 2008-05 Frost (IF) 0500008146 2007-04
B3 0600000837, 2008-06 Pink (IP) 0300812350 2006-08
B4 0500009037, 2007-05 Gray (IG) 0500009632 2008-10
C1 0500008412, 2007-05    
C2 0500008413, 2007-05    
C3 0500008430, 2007-05    
C4 0500006360, 2007-05    
D2 0500008431, 2007-05    
D3 0500008432, 2007-05    
D4 0500008433, 2007-05    
Table 2.
CIE L*a*b* average values and standard deviation (S.D) of Vitapan classical shade guide
  L* S.D a* S.D b* S.D
A1 55.72 0.50 −1.50 0.17 5.91 0.56
A2 55.54 0.21 −0.91 0.10 8.51 0.30
A3 52.23 0.21 −0.45 0.04 10.31 0.49
A3.5 51.16 0.12 −0.01 0.06 13.57 0.06
A4 48.62 0.34 0.14 0.05 13.01 0.31
B1 53.46 0.21 −1.79 0.04 4.81 0.11
B2 56.01 0.21 −1.94 0.06 8.87 0.08
B3 51.48 0.05 −0.85 0.05 12.92 0.31
B4 52.35 0.28 −0.78 0.06 14.06 0.12
C1 51.63 0.42 −1.26 0.12 6.15 0.24
C2 49.97 0.21 −0.98 0.09 9.38 0.19
C3 48.56 0.30 −0.80 0.05 9.99 0.11
C4 46.29 0.03 0.25 0.02 12.07 0.04
D2 50.44 0.16 −1.22 0.02 5.34 0.20
D3 50.20 0.18 −0.68 0.05 8.12 0.10
D4 48.47 0.30 −1.58 0.02 10.64 0.50
Table 3.
CIE L*a*b* average values and standard deviation (S.D) of Tescera Body composites
  L* S.D a* S.D b* S.D
A1 64.55 0.47 −3.36 0.33 1.12 0.33
A2 63.88 0.38 −3.26 0.31 3.52 0.35
A3 61.94 0.32 −2.49 0.28 3.94 0.36
A3.5 58.31 0.33 −1.51 0.40 6.86 0.41
A4 54.30 0.42 −0.66 0.19 9.22 0.52
B1 65.84 0.44 −3.81 0.28 2.30 0.28
B2 64.01 0.61 −4.06 0.45 3.19 0.34
B3 60.36 0.50 −2.88 0.33 6.52 0.33
B4 58.04 0.59 −2.66 0.25 8.22 0.36
C1 60.25 0.36 −2.86 0.28 −0.02 0.23
C2 55.74 0.45 −2.09 0.26 4.08 0.20
C3 52.66 0.22 −1.37 0.23 3.93 0.25
C4 51.48 0.44 −0.64 0.18 5.04 0.45
D2 58.79 0.33 −2.04 0.24 1.41 0.34
D3 57.53 0.55 −1.57 0.33 3.29 0.50
D4 56.54 0.52 −1.80 0.40 4.69 0.47
Table 4.
Color difference (△E*) between vitapan shade guide and tescera body composite
Shade A1 A2 A3 A3.5 A4 B1 B2 B3 B4 C1 C2 C3 C4 D2 D3 D4
△E* 10.22 10.00 11.79 9.92 6.88 12.80 10.04 11.13 8.36 10.73 7.92 7.34 8.78 9.27 8.83 10.03
Table 5.
CIE L*a*b* value of incisal composites that build-up on the A1 body composite, and color difference between body composite and incisal composite
  Body + Inc 0.5 mm
Body + Inc 1.0 mm
ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 63.69 −4.18 2.55 56.97 −3.45 −0.27 1.86 7.71
A1 Body ST 62.39 −4.20 1.78 55.82 −3.26 −0.30 2.41 8.85
  IC 63.10 −4.07 0.83 58.09 −2.02 −4.38 1.64 8.59
L*: 64.55 IN 62.23 −2.51 1.29 56.61 −1.62 −0.95 2.48 8.39
a*: -3.36 IY 65.18 −4.40 1.81 55.62 −3.03 4.29 1.4 9.49
b*: 1.12 IB 61.04 −3.60 −0.22 53.90 −3.06 −5.00 3.77 12.29
  IF 62.58 −3.92 1.10 58.97 −3.71 −0.56 2.05 5.84
  IP 64.39 −4.03 3.32 58.37 −1.95 1.32 2.31 6.34
  IG 62.80 −4.96 3.86 52.94 −3.18 1.99 3.62 11.65

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness incisal composite.

Table 6.
CIE L*a*b* value of incisal composites that build-up on the A2 body composite, and color difference between body composite and incisal composite
  Body + Inc 0.5 mm
Body + Inc 1.0 mm
ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 61.22 −4.02 3.11 56.05 −3.25 0.90 2.80 8.26
A2 Body ST 61.63 −2.65 1.62 54.70 −1.66 −1.62 3.01 10.64
  IC 62.91 −3.48 0.54 57.28 −1.98 −3.86 3.14 9.98
L*: 63.88 IN 59.78 −2.71 1.99 55.88 −1.47 −0.86 4.41 9.29
a*: -3.26 IY 60.68 −4.18 6.01 56.33 −3.12 5.56 4.17 7.83
b*: 3.52 IB 58.89 −3.95 0.57 52.82 −3.19 −3.41 5.84 13.05
  IF IP 63.09 62.66 −3.68 -3.48 3.06 5.31 59.09 56.33 −2.89 -1.60 0.45 1.73 1.01 2.18 5.71 7.93
  IG 63.26 −4.46 6.10 55.57 −2.80 3.24 2.92 8.33

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness incisal composite.

Table 7.
CIE L*a*b* value of incisal composites that build-up on the A3 body composite, and color difference between body composite and incisal composite
  Body + Inc 0.5 mm
Body + Inc 1.0 mm
ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 62.43 −3.10 3.77 55.53 −1.62 1.34 0.81 6.97
A3 Body ST 61.36 −3.15 1.74 56.13 −2.08 −2.20 2.36 8.45
  IC 62.84 −3.18 0.55 57.18 −2.05 −4.71 3.58 9.88
L*: 61.94 IN 59.87 −2.32 2.27 55.28 −0.70 −1.61 2.66 8.84
a*: -2.49 IY 61.46 −3.59 6.05 54.71 −2.41 3.65 2.43 7.23
b*: 3.94 IB 58.82 −3.16 −0.20 53.58 −2.85 −3.62 5.22 11.27
  IF 61.00 −2.22 2.09 56.97 −2.59 −0.89 2.09 6.92
  IP 60.08 −2.49 4.44 55.55 −1.29 1.60 1.92 6.91
  IG 61.26 −4.25 5.67 54.15 −2.62 1.87 2.57 8.05

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness incisal composite.

Table 8.
CIE L*a*b* value of incisal composites that build-up on the A3.5 body composite, and color difference between bBody composite and incisal composite
  Body + Inc 0.5 mm
Body + Inc 1.0 mm
ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 58.63 −1.56 4.36 53.35 −1.83 0.24 2.53 8.28
A3.5 Body ST 58.80 −2.51 3.54 54.08 −1.69 −0.48 3.50 8.49
  IC 58.96 −2.20 0.29 55.13 −0.82 −5.65 6.64 12.93
L*: 58.31 IN 58.38 −2.11 3.08 53.21 −0.42 −2.36 3.83 10.60
a*: -1.51 IY 59.57 −3.14 6.12 52.25 −1046 3.26 2.20 7.05
b*: 6.86 IB 56.76 −2.74 1.71 49.60 −1.23 −5.16 5.52 14.85
  IF 60.05 −2.82 2.15 56.89 −2.53 −1.36 5.19 8.41
  IP 57.77 −1.30 4.49 54.82 −0.83 0.74 2.45 7.08
  IG 58.74 −2.96 6.74 52.70 −1.76 1.37 1.52 7.86

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness incisal composite.

Table 9.
CIE L*a*b* value of incisal composites that build-up on the A4 body composite, and color difference between body composite and incisal composite
  Body + Inc 0.5 mm
Body + Inc 1.0 mm
ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 55.41 −1.69 2.75 51.46 −1.18 −1.35 6.65 10.95
A4 Body ST 56.13 −1.16 1.13 51.74 −0.73 −3.51 8.31 12.99
  IC 55.01 −1.37 4.73 51.77 −1.61 −0.23 4.60 9.82
L*: 54.30 IN 55.05 −0.41 2.86 51.43 0.16 −1.17 6.41 10.81
a*: -0.66 IY 55.79 −1.56 2.37 53.44 −1.14 −2.98 7.06 12.24
b*: 9.22 IB 53.29 −1.57 0.54 48.87 −1.24 −5.98 8.78 16.15
  IF 53.77 −1.12 3.94 48.26 −1.19 0.68 5.32 10.47
  IP 54.16 −0.37 4.57 50.53 1.55 −3.81 4.66 13.75
  IG 56.19 −0.62 1.00 54.21 −0.26 −7.28 8.43 16.50

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness incisal composite.

Table 10.
CIE L*a*b* value of incisal composites that build-up on the B1 body composite, and color difference between body composite and incisal composite
  Body + Inc 0.5 mm
Body + Inc 1.0 mm
ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 65.50 −5.21 3.16 58.01 −3.78 2.12 1.68 7.83
B1 Body ST 64.82 −4.20 2.27 57.27 −3.85 −0.55 1.09 9.03
  IC 65.38 −4.32 0.26 58.12 −3.05 −4.43 2.16 10.27
L*: 65.84 IN 63.16 −3.48 2.66 55.72 −1.73 −1.34 2.72 10.95
a*: -3.81 IY 61.32 −3.94 3.63 55.33 −3.95 4.54 4.72 10.75
b*: 2.30 IB 62.91 −4.55 0.10 54.45 −2.84 −5.12 3.74 13.63
  IF 65.27 −4.97 5.05 58.39 −3.41 0.01 3.04 7.80
  IP 62.40 −3.30 3.39 54.39 −1.31 0.61 3.65 11.84
  IG 66.09 −4.30 4.91 56.25 −3.24 3.59 2.67 9.70

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness incisal composite.

Table 11.
CIE L*a*b* value of incisal composites that build-up on the B2 body composite, and color difference between body composite and incisal composite
  Body + Inc 0.5 mm
Body + Inc 1.0 mm
ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 61.80 −4.68 3.32 55.21 −3.19 0.68 2.30 9.19
B2 Body ST 61.55 −4.93 3.31 58.00 −3.92 −0.49 2.61 7.04
  IC 63.13 −4.98 1.43 58.66 −3.02 −4.33 2.16 9.28
L*: 64.01 IN 61.22 −3.47 1.78 55.37 −2.12 −0.87 3.18 9.74
a*: -4.06 IY 60.29 −4.35 6.69 55.06 −3.19 3.86 5.11 9.02
b*: 3.19 IB 59.77 −4.62 0.07 52.12 −3.34 −4.94 5.29 14.41
  IF 62.12 −4.30 3.07 58.84 −3.27 −0.26 1.90 6.26
  IP 60.37 −3.74 3.87 55.42 −2.21 0.75 3.72 9.12
  IG 59.57 −3.86 5.22 54.69 −3.13 2.66 4.89 9.37

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness incisal composite.

Table 12.
CIE L*a*b* value of incisal composites that build-up on the B3 body composite, and color difference between body composite and incisal composite
  Body + Inc 0.5 mm
Body + Inc 1.0 mm
ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 57.95 −2.88 2.70 55.01 −2.91 0.56 4.52 8.01
B3 Body ST 59.89 −3.57 3.50 54.14 −2.28 −1.57 3.13 10.23
  IC 59.76 −1.78 −0.01 56.04 −1.66 −4.85 6.65 12.23
L*: 60.36 IN 58.61 −2.11 3.39 52.96 −0.35 −2.63 3.67 12.04
a*: -2.88 IY 59.08 −3.50 7.52 52.67 −2.50 3.82 1.74 8.17
b*: 6.52 IB 57.44 −3.74 1.64 51.32 −2.76 −6.13 5.76 15.56
  IF 61.05 −2.10 2.76 58.20 −2.54 −0.46 3.91 7.32
  IP 60.38 −2.48 3.62 54.23 −2.14 1.53 2.93 7.94
  IG 59.00 −3.40 5.58 53.37 −2.63 3.42 1.74 7.66

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness incisal composite.

Table 13.
CIE L*a*b* value of incisal composites that build-up on the B4 body composite, and color difference between body composite and incisal composite
  Body + Inc 0.5 mm
Body + Inc 1.0 mm
ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 58.29 −3.10 3.17 53.19 −2.35 0.38 5.07 9.23
B4 Body ST 58.73 −2.60 4.05 51.75 −0.88 −2.73 4.23 12.75
  IC 59.66 −3.32 1.55 55.37 −1.76 −5.34 6.90 13.85
L*: 58.04 IN 57.90 −2.88 5.89 52.96 −1.03 −1.76 2.34 11.31
a*: -2.66 IY 57.48 −2.78 7.78 52.74 −2.10 3.64 0.72 7.03
b*: 8.22 IB 56.84 −2.84 −0.46 50.15 −2.39 −5.83 8.77 16.12
  IF 59.67 −2.72 0.83 56.06 −2.09 −1.95 7.57 10.38
  IP 58.07 −2.65 5.52 51.26 −0.74 −0.12 2.71 10.92
  IG 57.12 −3.18 5.54 52.43 −2.23 1.36 2.88 8.87

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness incisal composite.

Table 14.
CIE L*a*b* value of incisal composites that build-up on the C1 body composite, and color difference between body composite and incisal composite
  Body + Inc 0.5 mm
Body + Inc 1.0 mm
ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 59.19 −3.47 −0.11 53.72 −1.05 −1.82 1.22 7.02
C1 Body ST 59.37 −3.51 −1.84 53.99 −2.44 −4.32 2.12 7.61
  IC 60.23 −3.14 −3.85 56.03 −1.99 −7.93 3.84 9.01
L*: 60.25 IN 56.20 −1.57 −1.98 53.96 −1.41 −2.95 4.68 7.09
a*: -2.86 IY 57.39 −3.78 3.02 53.67 −2.74 2.09 4.28 6.91
b*: -0.02 IB 57.81 −3.69 −1.34 51.39 −2.73 −6.08 2.89 10.74
  IF 59.74 −4.01 0.10 58.57 −3.14 −1.64 1.26 2.35
  IP 57.68 −2.90 0.86 52.22 −1.85 −0.86 2.73 8.14
  IG 57.90 −3.80 2.62 53.60 −2.74 0.78 3.66 6.71

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness incisal composite.

Table 15.
CIE L*a*b* value of incisal composites that build-up on the C2 body composite, and color difference between body composite and incisal composite
  Body + Inc 0.5 mm
Body + Inc 1.0 mm
ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 56.21 −2.99 0.74 53.21 −2.38 −1.71 3.49 6.33
C2 Body ST 53.76 −1.74 −1.00 54.66 −2.24 −3.94 5.46 8.10
  IC 58.16 −2.39 −0.96 54.64 −1.03 −7.59 5.59 11.77
L*: 55.74 IN 54.97 −1.51 −0.74 52.55 −0.97 −3.57 4.91 8.36
a*: -2.09 IY 53.77 −2.86 3.50 50.98 −1.95 1.10 2.20 5.62
b*: 4.08 IB 52.68 −2.62 −1.42 50.33 −2.08 −5.98 6.31 11.42
  IF 56.40 −2.46 −0.43 56.05 −2.55 −3.93 4.57 8.02
  IP 54.50 −1.83 1.23 52.51 −1.49 −1.11 3.12 6.14
  IG 54.47 −2.84 3.67 53.42 −2.58 1.25 1.54 3.69

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness incisal composite.

Table 16.
CIE L*a*b* value of incisal composites that build-up on the C3 body composite, and color difference between body composite and incisal composite
  Body + Inc 0.5 mm
Body + Inc 1.0 mm
ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 53.45 −2.17 −1.24 52.60 −2.81 −3.28 5.29 7.35
C3 Body ST 55.03 −1.31 0.31 52.34 −2.18 −5.35 4.33 9.32
  IC 53.14 −1.62 −3.97 53.43 −1.80 −8.27 7.92 12.23
L*: 52.66 IN 54.25 −0.21 −1.19 50.62 −0.94 −4.72 5.48 8.90
a*: -1.37 IY 52.80 −2.09 0.99 50.85 −2.58 −0.60 3.03 5.03
b*: 3.93 IB 51.23 −2.19 −3.18 48.90 −1.53 −7.65 7.29 12.18
  IF 55.31 −2.88 −1.53 55.63 −3.19 −3.85 6.25 8.52
  IP 54.30 −0.93 −0.37 51.53 −0.87 −3.75 4.62 7.78
  IG 52.50 −2.62 2.57 51.16 −1.72 −0.83 1.85 5.00

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness incisal composite.

Table 17.
CIE L*a*b* value of incisal composites that build-up on the C4 body composite, and color difference between body composite and incisal composite
  Body + Inc 0.5 mm
Body + Inc 1.0 mm
ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 52.03 −1.27 −0.37 53.01 −1.97 −2.86 5.47 8.15
C4 Body ST 52.86 −1.28 1.29 51.56 −1.47 −4.24 4.04 9.31
  IC 53.15 −0.68 −4.05 54.19 −1.75 −7.52 9.24 12.90
L*: 51.48 IN 52.09 −1.22 −0.96 51.14 −0.91 −4.53 6.05 9.58
a*: -0.64 IY 51.41 −1.69 2.55 51.37 −1.68 −1.03 2.70 6.15
b*: 5.04 IB 51.32 −1.20 −1.24 51.40 −1.64 −6.42 6.31 11.50
  IF 54.16 −1.40 −1.35 55.33 −2.18 −4.95 6.97 10.81
  IP 51.42 −0.26 1.00 51.64 −0.63 −2.10 4.06 7.13
  IG 51.34 −1.49 3.86 51.81 −1.69 −1.78 1.46 6.90

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness incisal composite.

Table 18.
CIE L*a*b* value of incisal composites that build-up on the D2 body composite, and color difference between body composite and incisal composite
  Body + Inc 0.5 mm
Body + Inc 1.0 mm
ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 57.52 −2.71 1.61 55.37 −1.58 −2.02 1.44 4.87
D2 Body ST 58.16 −2.77 −1.07 55.22 −2.23 −3.54 2.65 6.10
  IC 59.60 −2.29 −2.68 57.32 −2.30 −6.53 4.18 8.08
L*: 58.79 IN 56.54 −1.37 −0.69 54.82 −0.95 −3.47 3.15 6.38
a*: -2.04 IY 57.83 −3.06 3.84 53.85 −2.69 2.21 2.81 5.05
b*: 1.41 IB 56.66 −2.83 −2.28 52.45 −2.56 −6.82 4.33 10.39
  IF 57.89 −3.01 0.08 58.30 −3.26 −2.26 1.87 3.89
  IP 57.36 −2.22 −0.37 54.62 −1.98 −1.53 2.28 5.10
  IG 57.47 −2.67 2.61 55.12 −1.27 0.26 1.89 3.92

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness incisal composite.

Table 19.
CIE L*a*b* value of incisal composites that build-up on the D3 body composite, and color difference between body composite and incisal composite
  Body + Inc 0.5 mm
Body + Inc 1.0 mm
ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 57.90 −3.49 2.94 54.54 −3.45 −1.28 1.98 5.78
D3 Body ST 57.27 −2.20 1.48 54.53 −2.11 −3.35 1.93 7.31
  IC 57.70 −2.36 −2.47 56.89 −1.95 −6.42 5.82 9.74
L*: 57.53 IN 56.54 −2.38 1.06 54.33 −0.24 −4.18 2.57 8.24
a*: -1.57 IY 55.31 −3.45 5.24 54.10 −2.42 1.73 3.50 3.86
b*: 3.29 IB 56.28 −3.12 −0.45 53.79 −2.76 −6.10 4.24 10.18
  IF 58.72 −2.45 0.43 58.50 −2.79 −2.34 3.22 5.84
  IP 57.48 −2.50 2.35 52.41 −0.86 −1.74 1.32 7.21
  IG 56.38 −3.22 3.35 55.35 −2.99 0.78 2.01 3.62

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness incisal composite.

Table 20.
CIE L*a*b* value of incisal composites that build-up on the D4 body composite, and color difference between body composite and incisal composite
  Body + Inc 0.5 mm
Body + Inc 1.0 mm
ΔE* 0.5 ΔE* 1.0
    L* a* b* L* a* b*
  ILY 59.86 −3.49 1.33 55.99 −2.83 −1.44 5.02 6.24
D4 Body ST 57.92 −2.33 0.12 54.77 −2.31 −3.58 4.80 8.47
  IC 58.91 −1.30 −0.82 57.65 −1.52 −6.97 6.02 11.71
L*: 56.54 IN 57.89 −2.13 0.41 53.03 −0.64 −3.14 4.49 8.65
a*: -1.80 IY 56.89 −2.50 3.79 53.27 −2.10 1.44 1.19 4.61
b*: 4.69 IB 55.78 −2.26 −0.71 52.24 −1.82 −6.42 5.46 11.91
  IF 59.23 −3.19 −0.22 56.52 −3.12 −2.44 5.77 7.24
  IP 57.68 −1.79 1.42 55.05 −1.27 −1.76 3.46 6.64
  IG 57.77 −2.55 4.10 55.19 −1.77 1.62 1.56 3.35

△E* 0.5 & △E* 1.0, Color difference between body composite and 0.5 mm and 1.0 mm thickness incisal composite.

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